Features: BT- connection, convenient and fast-. Adopt new design of PCB- circuit board, reasonable circuit design. This Music Tesla- has a circuit protection- design that will not damage the input device and plays better music quality than normal curved- plasma speakers-. The musical Tesla- has wireless transmission and speaker capabilities that light up gas- tubes and various bubbles. It is the perfect teaching tool to stimulate students' interest in science and makes a great gift. Is a smart-device for wireless transmission experiments. Can be used to manufacture- high voltage- lightning-, wireless-power transmission, wireless lighting, insulator voltage- test and other scientific experiments. Teachers use it to demonstrate the principle and effect of boosting and high frequency flaking to students. Specifications: Material: Acrylic, PCB- Voltage-: 110-240VAC 50/60Hz Power: 0-120W Lightning- Length: 0-10cm(Knob Adjusted) Size: Approx. 10x10cm/3.94x3.94in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Host 1x Power Adapter(US Plug) 4x Atmosphere Light 1x Needle 1x EU- Adapter 1x Manual